// A few configuration settings
var HUE_SLIDER_LOCATION = 'img/h.png';
var SAT_VAL_SQUARE_LOCATION = 'img/sv.png';


function hexToRgb(hex_string, default_) {
    if (default_ == undefined) {
        default_ = null;
    }

    if (hex_string.substr(0, 1) == '#') {
        hex_string = hex_string.substr(1);
    }

    var r;
    var g;
    var b;
    if (hex_string.length == 3) {
        r = hex_string.substr(0, 1);
        r += r;
        g = hex_string.substr(1, 1);
        g += g;
        b = hex_string.substr(2, 1);
        b += b;
    }
    else if (hex_string.length == 6) {
        r = hex_string.substr(0, 2);
        g = hex_string.substr(2, 2);
        b = hex_string.substr(4, 2);
    }
    else {
        return default_;
    }

    r = parseInt(r, 16);
    g = parseInt(g, 16);
    b = parseInt(b, 16);
    if (isNaN(r) || isNaN(g) || isNaN(b)) {
        return default_;
    }
    else {
        return {
            r: r / 255,
            g: g / 255,
            b: b / 255
        };
    }
}

function rgbToHex(r, g, b, includeHash) {
    r = Math.round(r * 255);
    g = Math.round(g * 255);
    b = Math.round(b * 255);
    if (includeHash == undefined) {
        includeHash = true;
    }

    r = r.toString(16);
    if (r.length == 1) {
        r = '0' + r;
    }
    g = g.toString(16);
    if (g.length == 1) {
        g = '0' + g;
    }
    b = b.toString(16);
    if (b.length == 1) {
        b = '0' + b;
    }
    return ((includeHash ? '#' : '') + r + g + b).toUpperCase();
}

var arVersion = navigator.appVersion.split("MSIE");
var version = parseFloat(arVersion[1]);

function fixPNG(myImage) {
    if ((version >= 5.5) && (version < 7) && (document.body.filters)) {
        var node = document.createElement('span');
        node.id = myImage.id;
        node.className = myImage.className;
        node.title = myImage.title;
        node.style.cssText = myImage.style.cssText;
        node.style.setAttribute('filter', "progid:DXImageTransform.Microsoft.AlphaImageLoader" +
		"(src=\'" +
		myImage.src +
		"\', sizingMethod='scale')");
        node.style.fontSize = '0';
        node.style.width = myImage.width.toString() + 'px';
        node.style.height = myImage.height.toString() + 'px';
        node.style.display = 'inline-block';
        return node;
    }
    else {
        return myImage.cloneNode(false);
    }
}

function trackDrag(node, handler) {
    function fixCoords(x, y) {
        var nodePageCoords = pageCoords(node);
        x = (x - nodePageCoords.x) + document.documentElement.scrollLeft;
        y = (y - nodePageCoords.y) + document.documentElement.scrollTop;
        if (x < 0)
            x = 0;
        if (y < 0)
            y = 0;
        if (x > node.offsetWidth - 1)
            x = node.offsetWidth - 1;
        if (y > node.offsetHeight - 1)
            y = node.offsetHeight - 1;

        return {
            x: x,
            y: y
        };
    }
    function mouseDown(ev) {
        var coords = fixCoords(ev.clientX, ev.clientY);
        var lastX = coords.x;
        var lastY = coords.y;
        handler(coords.x, coords.y);

        function moveHandler(ev) {
            var coords = fixCoords(ev.clientX, ev.clientY);
            if (coords.x != lastX || coords.y != lastY) {
                lastX = coords.x;
                lastY = coords.y;
                handler(coords.x, coords.y);
            }
        }
        function upHandler(ev) {
            myRemoveEventListener(document, 'mouseup', upHandler);
            myRemoveEventListener(document, 'mousemove', moveHandler);
            myRemoveEventListener(document, 'mouseout', outHandler);
            myAddEventListener(node, 'mousedown', mouseDown);
        }
        function outHandler(e) {
            e = e ? e : window.event;
            var from = e.relatedTarget || e.toElement;
            if (!from || from.nodeName == "HTML") {
                upHandler(e);
            }
        }
        myAddEventListener(document, 'mouseup', upHandler);
        myAddEventListener(document, 'mouseout', outHandler);
        myAddEventListener(document, 'mousemove', moveHandler);
        myRemoveEventListener(node, 'mousedown', mouseDown);
        if (ev.preventDefault)
            ev.preventDefault();
    }
    myAddEventListener(node, 'mousedown', mouseDown);
    node.onmousedown = function (e) {
        return false;
    };
    node.onselectstart = function (e) {
        return false;
    };
    node.ondragstart = function (e) {
        return false;
    };
}

var eventListeners = [];

function findEventListener(node, event, handler) {
    var i;
    for (i in eventListeners) {
        if (eventListeners[i].node == node && eventListeners[i].event == event &&
		eventListeners[i].handler == handler) {
            return i;
        }
    }
    return null;
}

function myAddEventListener(node, event, handler) {
    if (findEventListener(node, event, handler) != null) {
        return;
    }

    if (!node.addEventListener) {
        node.attachEvent('on' + event, handler);
    }
    else {
        node.addEventListener(event, handler, false);
    }

    eventListeners.push({
        node: node,
        event: event,
        handler: handler
    });
}

function removeEventListenerIndex(index) {
    var eventListener = eventListeners[index];
    delete eventListeners[index];

    if (!eventListener.node.removeEventListener) {
        eventListener.node.detachEvent('on' + eventListener.event, eventListener.handler);
    }
    else {
        eventListener.node.removeEventListener(eventListener.event, eventListener.handler, false);
    }
}

function myRemoveEventListener(node, event, handler) {
    removeEventListenerIndex(findEventListener(node, event, handler));
}

function cleanupEventListeners() {
    var i;
    for (i = eventListeners.length; i > 0; i--) {
        if (eventListeners[i] != undefined) {
            removeEventListenerIndex(i);
        }
    }
}

myAddEventListener(window, 'unload', cleanupEventListeners);

// This copyright statement applies to the following two functions,
// which are taken from MochiKit.
//
// Copyright 2005 Bob Ippolito <bob@redivi.com>
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject
// to the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
// BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
// ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

function hsvToRgb(hue, saturation, value) {
    var red;
    var green;
    var blue;
    if (value == 0.0) {
        red = 0;
        green = 0;
        blue = 0;
    }
    else {
        var i = Math.floor(hue * 6);
        var f = (hue * 6) - i;
        var p = value * (1 - saturation);
        var q = value * (1 - (saturation * f));
        var t = value * (1 - (saturation * (1 - f)));
        switch (i) {
            case 1:
                red = q;
                green = value;
                blue = p;
                break;
            case 2:
                red = p;
                green = value;
                blue = t;
                break;
            case 3:
                red = p;
                green = q;
                blue = value;
                break;
            case 4:
                red = t;
                green = p;
                blue = value;
                break;
            case 5:
                red = value;
                green = p;
                blue = q;
                break;
            case 6: // fall through
            case 0:
                red = value;
                green = t;
                blue = p;
                break;
        }
    }
    return {
        r: red,
        g: green,
        b: blue
    };
}

function rgbToHsv(red, green, blue) {
    var max = Math.max(Math.max(red, green), blue);
    var min = Math.min(Math.min(red, green), blue);
    var hue;
    var saturation;
    var value = max;
    if (min == max) {
        hue = 0;
        saturation = 0;
    }
    else {
        var delta = (max - min);
        saturation = delta / max;
        if (red == max) {
            hue = (green - blue) / delta;
        }
        else if (green == max) {
            hue = 2 + ((blue - red) / delta);
        }
        else {
            hue = 4 + ((red - green) / delta);
        }
        hue /= 6;
        if (hue < 0) {
            hue += 1;
        }
        if (hue > 1) {
            hue -= 1;
        }
    }
    return {
        h: hue,
        s: saturation,
        v: value
    };
}

function pageCoords(node) {
    var x = node.offsetLeft;
    var y = node.offsetTop;
    var parent = node.offsetParent;
    while (parent != null) {
        x += parent.offsetLeft;
        y += parent.offsetTop;
        parent = parent.offsetParent;
    }
    return {
        x: x,
        y: y
    };
}

var isRTL = /rtl/i.test(window.document.body.className);

// The real code begins here.
var arrowLeft = document.createElement('i');
arrowLeft.className = 'icon-caret-right-aligned-left color-picker-hue-selector-arrow';
var arrowRight = document.createElement('i');
arrowRight.className = 'icon-caret-left-aligned-right color-picker-hue-selector-arrow';
var huePositionImg = document.createElement('div');
huePositionImg.style.width = 35;
huePositionImg.style.height = 11;
huePositionImg.appendChild(arrowLeft);
huePositionImg.appendChild(arrowRight);
huePositionImg.style.position = 'absolute';
// New css class for safari
huePositionImg.setAttribute("class", "color-picker-slider-arrows");

var hueSelectorImg = document.createElement('img');
hueSelectorImg.galleryImg = false;
hueSelectorImg.width = 35;
hueSelectorImg.height = 200;
hueSelectorImg.src = HUE_SLIDER_LOCATION;
hueSelectorImg.style.display = 'block';

var satValImg = document.createElement('img');
satValImg.galleryImg = false;
satValImg.width = 200;
satValImg.height = 200;
satValImg.src = SAT_VAL_SQUARE_LOCATION;
satValImg.style.display = 'block';
satValImg.style.cursor = 'pointer';

var crossHairsImg = document.createElement('i');
crossHairsImg.className = "icon-crosshair color-picker-crosshair-icon";
crossHairsImg.width = 21;
crossHairsImg.height = 21;
crossHairsImg.style.position = 'absolute';

function makeColorSelector(inputBox) {
    var rgb, hsv;

    function colorChanged() {
        var hex = rgbToHex(rgb.r, rgb.g, rgb.b);
        var hueRgb = hsvToRgb(hsv.h, 1, 1);
        var hueHex = rgbToHex(hueRgb.r, hueRgb.g, hueRgb.b);
        previewDiv.style.background = hex;
        inputBox.value = hex;
        satValDiv.style.background = hueHex;
        crossHairs.style.left = ((hsv.v * 199) - 11).toString() + 'px';
        crossHairs.style.top = (((1 - hsv.s) * 199) - 11).toString() + 'px';
        huePos.style.top = ((hsv.h * 199) - 6).toString() + 'px';
    }
    function rgbChanged() {
        hsv = rgbToHsv(rgb.r, rgb.g, rgb.b);
        colorChanged();
    }
    function hsvChanged() {
        rgb = hsvToRgb(hsv.h, hsv.s, hsv.v);
        colorChanged();
    }

    var colorSelectorDiv = document.createElement('div');
    colorSelectorDiv.style.position = 'relative';

    var satValDiv = document.createElement('div');
    satValDiv.style.position = 'relative';
    satValDiv.style.width = '200px';
    satValDiv.style.height = '200px';
    var newSatValImg = fixPNG(satValImg);
    satValDiv.appendChild(newSatValImg);
    var crossHairs = crossHairsImg.cloneNode(false);
    satValDiv.appendChild(crossHairs);
    function satValDragged(x, y) {
        hsv.s = 1 - (y / 199);
        hsv.v = (x / 199);
        hsvChanged();
    }
    trackDrag(satValDiv, satValDragged);
    colorSelectorDiv.appendChild(satValDiv);

    var hueDiv = document.createElement('div');
    hueDiv.style.position = 'absolute';
    if (isRTL) {
        hueDiv.style.right = '230px';
    }
    else {
        hueDiv.style.left = '230px';
    }
    hueDiv.style.top = '0px';
    hueDiv.style.width = '35px';
    hueDiv.style.height = '200px';
    var huePos = huePositionImg;
    hueDiv.appendChild(hueSelectorImg.cloneNode(false));
    hueDiv.appendChild(huePos);
    function hueDragged(x, y) {
        hsv.h = y / 199;
        hsvChanged();
    }
    trackDrag(hueDiv, hueDragged);
    colorSelectorDiv.appendChild(hueDiv);
    var inlineDiv = document.createElement('div');
    inlineDiv.className = 'control-group-inline';
    var previewDiv = document.createElement('div');
    previewDiv.className = 'color-picker-preview';
    previewDiv.innerHTML = 'Text';
    inlineDiv.appendChild(previewDiv);

    function inputBoxChanged() {
        rgb = hexToRgb(inputBox.value, {
            r: 0,
            g: 0,
            b: 0
        });
        rgbChanged();
    }
    myAddEventListener(inputBox, 'change', inputBoxChanged);
    inputBox.className = 'color-picker-textbox';
    inlineDiv.appendChild(inputBox);

    colorSelectorDiv.className = 'color-picker-wrapper-div';
    colorSelectorDiv.appendChild(inlineDiv);

    inputBoxChanged();

    return colorSelectorDiv;
}

function makeColorSelectors() {
    var colorInput = document.querySelector('input.Color');
    if (colorInput) {
        var parent = colorInput.parentNode;
        var prevNode = colorInput.previousSibling;
        var selector = makeColorSelector(colorInput);
        parent.insertBefore(selector, (prevNode ? prevNode.nextSibling : null));
    }
}

myAddEventListener(window, 'load', makeColorSelectors);
